latest happens on -- happened on valentine's day. >> there is a great deal of worry tonight in the community. a robber may be on the loose. with a composite sketch, police are hoping you can crack this case. loudoun county authorities want you to take a very close look at the composite sketch of the person believed responsible for a string of armed robberies, the most recent just last friday. police say the suspect has targeted women. >> i am terrified. this is a nice area. susan baker like are particularly concerned. it happened. >> police believe the suspect struck twice this month. they say he took out a firearm and asked for a wallet. >> as soon as the woman screams, he runs. if you are so scared, you cannot get a scream out. >> the residents are aware of these crimes and their environment. >> i tried to keep aware of my surroundings. if anybody is following me. >> it is a very scary thing. you try to take every precaution you can think of. >> the other two cases happened in december and occurred in the morning. for them, the only time that matters is when police have a suspect in custod